Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38580cca01c3e0a…

MALICIOUS

PDF

69.9 KB Created: 2021-10-11 05:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 86b9b760041c739754065c27c7f43a34 SHA-1: 47fe6c2acbfde1b80ef5ef0a0243fa47d9079079 SHA-256: a38580cca01c3e0ae1aef1f729a1341fbcd45a5f5436af0ca59e20e153db17d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the presence of numerous URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://careersourcechipola.com/files/public/sukosepokuvuxojosufawogu.pdf In PDF document text
    • http://taixingchem.com/uploadfile/file/20210914143738088.pdfIn PDF document text
    • http://flyingwedge.com/uploads/assets/file/3558150703.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4728fc9d337ab522cb7fdc5eedd8dfcc/12551174227.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/1gfsq8j8p3uhnl70lj13hhjc8c/dapasafi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8b7e517402a07a8462a59849090b9703/jitupig.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/befowu.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/viwuromumesowiwiz.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/23025907799.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/kakekepegojomedabunugo.pdfIn PDF document text
    • http://m2m2design.com/userfiles/66482790327.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/rubosilofebagoz.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/2422884002.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/31701803398.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/o2uc03ru0vr8brkv4ujt3djmc2/dalerogejosofu.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/69960096835.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/11669534940.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/56007614951.pdfIn PDF document text
    • https://pokereshop.cz/data/file/59541977168.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20211010160225.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/74748782222.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161474eb17efa8---xutamumebetifibali.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/60343744286.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/jisabigezidofotepepaze.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615143e4e9512---zorel.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/17265083935.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/mazunivaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=example+of+conceptual+and+theoretical+frameworkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB40B 11080 bytes
SHA-256: 2ee09d91bf336c9dcfda83b8894e4d2fb2d8e95f8516641fb7362e44cb5f6070
font_01_sfnt_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 14504 bytes
SHA-256: 3f39e1edd79c21dfd638d38a081e02b2b5b640312a904165373fd7bd217e996c
font_02_sfnt_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1